package com.itheima;

import java.util.concurrent.Callable;

public class TestLambda {
    public static void main(String[] args) {
//        testA();
//        testB();
//        testC();
        testD();
    }

    private static void testD() {
        D d1 = new D() {
            @Override
            public int max(int a, int b) {
                return Math.max(a, b);
            }
        };
        D d2 = (a, b) -> a > b ? a : b;
        D d3 = Math::max;
        int max = d3.max(1, 2);
        System.out.println(max);
    }


    private static void testC() {
        C c1 = new C() {
            @Override
            public String show(String name) {
                return "name =" +  name;
            }
        };
        C c2 = name -> "name =" +  name;

        C c3 = TestLambda::show4;

        String result = c3.show("张显波");
        System.out.println(result);
    }
    public static String show4(String name) {
        return "name =" +  name;
    }
    public static void testB() {
        //1.创建B接口的匿名内部类对象
        B b1 = new B() {
            @Override
            public void show(String name) {
                System.out.println("name");
            }
        };
        //创建B接口的Lambda表达式对象
        B b2 = name -> System.out.println("name");
        //创建B接口的方法引用对象
        B b3 = System.out::println;
        b3.show("李明同学");
    }
    public static void testA() {
        //1.创建A接口的匿名内部类对象
        A a1 = new A() {
            @Override
            public void show(String name, int age) {
                System.out.println(name + "," + age);
            }
        };

        //2.将匿名内部类对象改成Lambda表达式
        A a2 = (name, age) -> System.out.println(name + "," + age);
        a2.show("张三",18);

        //3.使用方法引用替换Lambda表达式(静态方法)
        A a3 = TestLambda::show2;
        a3.show("李四",20);

        //3.使用方法引用替换Lambda表达式(成员方法)
        TestLambda testLambda = new TestLambda();
        A a4 = testLambda::show3;
        a4.show("王五",35);
    }
    public static void show2(String name, int age) {
        System.out.println("show2:"+name + "," + age);
    }
    public void show3(String name, int age) {
        System.out.println("show3:"+name + "," + age);
    }
}
